11 x 28 inch 6 loop rear rim. Rim is universal for 12 x 28 inch tires

28 inch rear wheel disc for 8N, NAA/Jubilee, 600, 601, 700, 701, 800, 801, 900, 901, 2000, 4000; (1948/1964); 2000, 3000, 4000; 2600, 3600

9 x 28 inch 6 loop rear rim. Rim is universal for 10 x 28 inch tires